| 摘要 |
PROBLEM TO BE SOLVED: To provide an aerostatic gas bearing which is capable of curbing the generation of a self-exited vibration and stably supporting an object to be supported and is low in cost, and to provide a linear motion guiding device using the aerostatic gas bearing.SOLUTION: An aerostatic gas bearing 1 comprises a bearing basal body 2 which is opened at an annular protrusion 6 provided integrally with one surface of a basal portion 4 and protrudingly from the basal portion 4 and at a protruding end face of the annular protrusion 6 in one end, and at the same time includes an air supply passage 11 opened on an outer circumferential surface of the basal portion 4 in the other end, a bearing body 3 with a plurality of air ejection holes 38 communicating with an annular depression that receives the annular protrusion 6 of the bearing basal body 2 and an annular depressed groove 33 and a self-exciting vibration damping mechanism A for damping the self-exciting vibration caused by the air ejection from the air ejection holes 38 via the annular depressed groove 33. |
